// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "views/focus/widget_focus_manager.h"

#include "base/memory/singleton.h"

namespace views {

// WidgetFocusManager ----------------------------------------------------------

// static
WidgetFocusManager* WidgetFocusManager::GetInstance() {
  return Singleton<WidgetFocusManager>::get();
}

void WidgetFocusManager::AddFocusChangeListener(
    WidgetFocusChangeListener* listener) {
  focus_change_listeners_.AddObserver(listener);
}

void WidgetFocusManager::RemoveFocusChangeListener(
    WidgetFocusChangeListener* listener) {
  focus_change_listeners_.RemoveObserver(listener);
}

void WidgetFocusManager::OnWidgetFocusEvent(gfx::NativeView focused_before,
                                            gfx::NativeView focused_now) {
  if (enabled_ && focused_before != focused_now) {
    FOR_EACH_OBSERVER(WidgetFocusChangeListener, focus_change_listeners_,
                      OnNativeFocusChange(focused_before, focused_now));
  }
}

WidgetFocusManager::WidgetFocusManager() : enabled_(true) {}

WidgetFocusManager::~WidgetFocusManager() {}

// AutoNativeNotificationDisabler ----------------------------------------------

AutoNativeNotificationDisabler::AutoNativeNotificationDisabler() {
  WidgetFocusManager::GetInstance()->DisableNotifications();
}

AutoNativeNotificationDisabler::~AutoNativeNotificationDisabler() {
  WidgetFocusManager::GetInstance()->EnableNotifications();
}

}  // namespace views
